Meter-testing device.



T. E. MURRAY, JR. METER TESTING DEVICE.

APPLICATION FILED SEQ 2,1915. 1,189,855.

Patented July 4, 1916.

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METER TESTING DEVICE.

' APPLICATION FILED DEC 2. 1915- I L1$9.855, Patented July 1, 1916,

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EZURBAYQJR F BROUKLIN, NEW YORK, ASSEGNQIR. T0 EIHGMAS E.

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METER-TESTING DEVlCE.

Application filed December 2, 1915. Serial To all wit-0m 2'25 may concern Be it known that I, Tnoims E. lliURaAr, 512, a citizen or" the United States, residing; at Brookiyn, in the county of Kings and State of Nelv York, have inventeda certain new and useful improvement in Meter- Testing Devices, or" which the following is a specification.

The invention relates to meter testing ci1t- 11"; outs. and consists in the construction more particularly hereinafter set forth.

single gang plug cooperates with the Y pivoted levers of the service switch to shunt the line around the meter, thus providing for the continuance oi the customers service during the test. lVhen the sw tch levers are swung upward in position to open circuit to the meter, pivoted contact arms on said gang plug continue to keep the circuit closed to the meter through a potentialconduct-0r and the neutral conductor of the three-wire line system. The insertion of a bridge between two of the meter terminals connects the current coils of the meter in circuit. The testing conditions are thus established, and the meter reading is com pared with that of a standard wattnieter suitably connected to said gang plug.

In the accompanying drawings Figure 1' 1s a plan view of a service switch for three-wire system, to which I. apply devices, as hereinafter described, for shunting the load around the meter and connecting said meter in circuit with testing apparatus. Fig. 2 is an electrical diagram showing the connections in 1. Fig. 3 is a plan view of the service switch with the gang plug in place. Fig. l is a diagram showing the connections corresponding to Fig. V Fig. 5 is a section on the line al and Fig. 6 is a section on the line 9 3/ of Fig. 3, viewed in the direction of the arrows in said figure. F T is a. side elevation show ing the switch lever 3 in raised position and the pivoted contact arm :2? remaining in contact with one of? the clips 13. Fig. 8 is an end elevation showing the switch is vers in position for making the meter test. Fig. 9 1s a diagram showing the connections corresponding; to Fig. 8. Fig. 10 is a perspective view of the bridge U. Fig. 11 is a perspective view of the gang plug.

Similar numbers and letters of reference indicate like parts. 1

The service switch shown in Fig. l. com- Specification of Letters Patent.

1s connects 28 of insulating material, he

Ito. 84,693.

prises ahasc 1, on which is a series or supports wherein are fivoted the switch levers 3, 4r, 5, (3, 7. Said supports are elec trically connected to the terminals 8., 9, 10, 11, 12. The service lead A, here positive, is connected to the terminal 8. The service lead ll, here negative is connected. to terminal 10. The service lead C. here neu i to terminal 9. positive lead one. negative lea-cl E from the load F are respectively connected terminals '11 and 12. The switch le' -s 3, 4, 5, 6 and T cooperate respectively with contact clips 13, which in turn are connected to terminals 14:, 15. 16., ll, 1.8. The meter shown diagrannnaticaliy in F 2, 4 and S has one of its current coils G connected to terminals lei 17 and the other of its current coils H connected to terminals 16, 18. The neutral lead I from the load l is connected to ter minal and the potential coil .3 is conpreterahlv placed between the terminals 8,

9, l0 and the pivot supports of levers 3, 4, The lovers 3, 4t, 5 are lli'llbild by a bar I an open ating imndle 21. The lovers 6, Z are similarly united by a bar having handle 23.

"it will he'o'bvious from Fig. 2 that'the supply'cnr-rent passes'thro'ugn the meter to the lOz'LCi-tl1i$ being the normal service condition.

The testing; ping, shown, in persp tive in Fig. 11., in plan in side elevation in Figs. 6 and s and end ele vation in Fig. 7, comprises the contacts and connections hereinafter forth mounted on a bar 24 of insulating material, provided with a handle Beginning on the left of Fig. 11, a depending h .acliet arm .Zficarries at its lower end a pivoted arm at the es:- tremity of which is e il -shaped spring contact. 28. The upper portion or" arrnfifi is bent at right angles to enter between bar 24 and a metal strap 539 which extends over the top of bar 2-1 and receives a binding screw 30. On the under side of the lower portion. of arm 25 is a plate of insulating material, and below this is a depending ed by an arm 32 of a metal strip Fig".

. contact clip 31. @ontact clip 31 is snpport- G, which extends over the top of bar 2st and receives a binding screw To a hrack t arm 85 similar to bracket arm 25, pat 

